[%c_effect h8;square;h8;type;Mistake;persistent;true] The wrong square. Now White is winning, thanks to an incredible tactical idea.
22. e4f6 A desperate attempt to create a counterattack. 22... e7f6  23. g5f6  23... b7b3 This doesn't spoil anything, but 23...g6 is safer. 24. g1g7 